JPS6050654A - Loading device of tape - Google Patents

Abstract

PURPOSE:To reduce the titled device at its size and weight and to make the device sure by using a ring-like guide member having a taper groove and guide rails engaging with the groove for regulating the height position of a lever member fixed on one loading ring and to be moved in the axial direction. CONSTITUTION:When a guide member 23 is located on the inclinded parts of the guide rails 24, 25, the guide rail 24a supports the guide member 23 by its upper and lower edge parts 23a, 23b as shown by the broken line to regulate the height of the guide member 23. When the loading ring 21 is turned and the guide member 23 is located on the horizontal parts of the guide rails 24, 25, the upper and lower ends of the guide rails 24b are abutted to the surface of the groove of the guide member 23 as shown by the alternate long and short dash line to regulate the height of the guide member 23. Even if the guide member 23 is located on the positions where the inclines of the guide rails 24, 25 are changed, the guide member 23 can be moved smoothly because tapers are fitted to the upper and lower parts of the groove of the guide member 23. Thus, the device can be reduced at its size and weight and the position of the tape guide can be surely regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a tape mounting device for drawing out a tape from a tape cassette and winding it around a cylinder at a wide angle in a helical scan VTRK.

[Background of the invention]

As a conventional loading method in which the tape guide is rotated around the cylinder while gradually increasing its height and finally being regulated to a specified position, there is a β method shown in Fig. 1. VTR, etc. (Japanese Unexamined Patent Publication No. 57-86161
The tape guide height can be adjusted by moving the moving member 56 to which the tape guides 51 and 52 are fixed along p-@so, which is inclined relative to the tape cassette surface. A method of increasing is used. However, in the above method, when the moving member 53 is moved along the moving path 50, the guide portions 56α, b of the moving member have the same length in the moving direction due to its structure, so the slope of the moving path is steep. Therefore, it is necessary to make the slope section of the moving path 50 long and as smooth as possible, and to increase the vertical clearance between the guide portions 55a and 55h of the moving member. Therefore, there is a problem in that the design of the moving path and the moving members becomes extremely difficult and complicated.

[Purpose of the invention]

The object of the present invention is to provide a compact, lightweight, and reliable tape mounting machine for winding tape around a cylinder in a wide-angle spiral pattern. The aim is to provide the following.

[Summary of the invention]

The present invention includes one loading ring, a shaft fixed to this ring, and a ring-shaped guide member with a tapered groove for regulating the height position, which is a member that moves in the axial direction and engages with this groove. The present invention is characterized in that a reliable tape mounting mechanism is achieved by using a guide rail, and that the tape guide position regulation on the cylinder entry and exit sides is achieved with a simple mechanism.

[Embodiments of the invention]

Embodiments of the present invention will be explained below with reference to the drawings. FIG. 2 is a diagram showing a tape running system in a state where the tape has been loaded in one embodiment of the present invention. The magnetic tape (hereinafter referred to as tape) 4 that has come out from the supply reel 2 in the cassette 1 passes through a tension bin 51, an erasing head 6, a width regulating tape guide 7, and a tape guide 8 on the cylinder entry side, and then rotates through a 360° angle to the cylinder 9. After winding slightly, the cylinder exit side tape guide 10, width regulating tape guide 11, voice control head 12. Capstan 13° pinch roller 14. Roller guide 15. Standing guide 16, tilting allowance 1 guide 17.
The height regulating guide 18 is completely guided and wound onto the take-up reel 3. Before starting tape loading, each tape guide is
Each one is located at the position where the dasosee is attached.

Here, on the supply reel side, the tape 4 comes out of the cassette 1 and reaches the cylinder 9 without changing its height. That is, the tension bin 5' width regulating guide 7' and the cylinder entry side tape guide 8' move to positions 5, 7, and 8, respectively, without changing their heights before and after the tape is loaded. The tape 4 has a lead angle and is wound spirally around the cylinder 9. At this time, the cylinder 9 is inclined by the lead angle from the cylinder entrance guide force to the tape traveling direction to the cylinder. The tape 4 is wound around the cylinder 9 in a spiral manner while increasing its height, and is higher on the exit side of the cylinder than on the entrance side. The tape exiting the cylinder travels in a direction K that is approximately parallel to the tape running direction on the cylinder entry side, that is, approximately horizontally without changing its height, and reaches the upright guide 16. The standing guide 16 is slightly inclined in the direction opposite to the running direction from the roller guide 15 to the standing guide 16, that is, in the direction of the roller guide 15. Therefore tape 4
is bent downward in one direction of travel by the upright guide 16. The inclined guide 17 is inclined in the same direction as the upright guide 16, and the twist of the tape is corrected so that it is at the same height as the supply reel side of the cassette 1.

Figure 3 shows an overview of the tape mounting mechanism. FIG. 3 shows the state in the middle of tape mounting, and the dashed line shows the state before tape mounting starts. Cylinder exit guide 101 width regulation guide 1
1 is fixed on the output side base 19. The exit base 19 is swingably supported by the rotating member 20. The rotating member 20 is attached to be rotatable and movable in the axial direction (vertical direction) about a shaft 22 fixed to the loading ring 21 . The details of the structure of this part are shown in FIG. In FIG. 4, a grooved ring-shaped guide member 23 is fixedly or rotatably supported under pressure on the rotating member 20, and a shaft 23 fixed to a loading ring 21 is shown in FIG.
2, and is movable in the axial direction.

Further, as shown in FIG. 5, the guide portion 23 has a groove tapered upward and downward so as to fit into guide rails 24 and 25, which will be described later. Details regarding this K will be described later. In FIG. 4, the rotation member 20 and the loading ring 210 are supported by a wire spring 26,
A reaction force is applied to the rotation of the rotary member 20 about the entire center of the machining shaft 22, and the rotational position of the rotary member 20 is regulated.

A shaft 27 is fixed to the end of the rotating member 20, and a pinch roller holding lever 28 is rotatably coupled to the shaft 27. The pinch roller 14 is fixed to one end of the pinch roller holding lever 28, and the bottle 29 is fixed to the other end. bottle 2
9 is provided to drive the pinch roller holding lever 2B. The torsion spring 30 also controls the position of the pinch roller holding lever 28 during tape installation. A convex portion 31 is formed below the shaft 27 concentrically with the shaft, and this determines the rotational position of the rotary member 20 when the tape is mounted. This will be discussed later.

Next, a method for regulating the position of the rotating part 20 during rotation will be described. Before starting tape loading, the rotating member 20 and the members connected thereto are at the position 20' in FIG. 3. A gear 32 is formed to apply the outer peripheral pressure of the loading ring 21 to the driving force of a loading motor (not shown), and the loading ring 21 rotates in the direction of the arrow. Accordingly, the rotating member 20 rotates around the cylinder from the position 20'. During rotation, the inner guide rail 24,
An outer guide rail 25 is provided, and the guide rail 2
4.25, a guide member 25 connected to the pivot member 20;
are engaged. This engaged state is shown in the fifth figure.

Furthermore, as shown in FIG.
3 is engaged with a protrusion 31 provided on the rotating member 20.

This state 1c is shown in the sectional view of FIG. This will be discussed later. Further, the guide rails 24 and 35 have boxwood slopes so that the rotating part 20 rises as the rotating member 200 rotates. A side development view of this state is shown in FIG.

Next, a method for regulating the height of the rotating member 20 during loading will be described. In Figure 6, guide rail 24.25
When the guide member 23 is located on the slope part of the guide member 23, the relationship between the guide rail 24α and the guide member 23 is as shown in FIG. Edge part 23α and lower edge part 23h
to regulate the height of the guide member 23. Next, when the loading ring 21 rotates and the guide member 23 is located on the horizontal portion of the guide rail 24.25, the guide tray/L/24b is placed on the guide member 26 as shown by the dashed line in FIG. At this time, the guide member upper edge portions 23α, 23c'c, the upper end of the guide rail 24h, the guide member lower edge portions 23h, 23d, and the lower end of the guide tray #24b support the guide member. The height of the member 23 is fully regulated. Also, the position of the guide member 23 is shifted from the slope part 244 of the guide rail 24.25 to the horizontal part 24.
h, that is, when the slope changes, the upper and lower parts of the groove of the guide member 25 are tapered, and the guide member 23 itself is circular, so the slope of the guide rails 24 and 25 changes. You can move smoothly along the guide rail. The above explanation is a method for regulating the height of the rotating member 20 during tape loading, but the same applies to unloading, except that the rotating direction of the loading ring 21 is reversed. In addition, the height regulating method described above is such that the upper and lower edges 23 (Z~23d) of the guide member 23 are always aligned with the guide rail 24.
, 25, but if there is a gap in the vertical direction between the groove part of the guide member 23 and the guide rails 24α, 24b due to component accuracy or resistance during loading, etc. In this case, the height should be regulated at either the upper or lower edge of the groove of the guide part 25.
However, in this case, during loading, the upper edge portion 23α or 231 of the groove of the guide member 23?
Guide rail 24α.

24, Is is supported at the upper end portion, and during unloading, the lower edge portion 23h of the guide member 23 or 2
3d is supported by the lower ends of the guide rails 24α and 24h to restrict the height of the edge. In addition, as shown by the broken line in FIG.
At this time, the guide member 2
3 is always regulated by the upper ends of the guide rails 24, 25 and the upper edges 23α, 23C of the guide wing 23, both during loading and unloading. Furthermore, if a compression spring is inserted between the guide member 23 and the loading ring 21, the guide member 23 always has the lower edge 23 of the guide member 23 at the lower end of the guide rails 24α, 24b.
h and 23d are often crimped, so the height can be regulated in this case as well. Also, as is clear from the above explanation,
Since the groove portion of the guide member 23 is tapered, the height position of the rotating member 20 can be sufficiently regulated even if the slope of the guide and the trail 24, 25 changes midway.

Next, a method for regulating the position of the rotating member 20 in the rotating direction around the shaft 22 will be described. As shown in FIG.
is engaged with the guide rail 33 during rotation. Due to the action of this guide rail, the convex portion 31 is forcibly moved in the direction away from the cylinder 9, and therefore the rotating member 20
rotates around the shaft 21. The convex portion 31 is the fourth
As shown in the figure, the working pressure area of the spring 26 is pressed against the side wall portion 33α of the guide rail. Preferably, the periphery of this convex portion is a roller, and is formed to rotate about the central axis. This reduces friction with the side walls. In addition, @ is attached to the guide rail side wall portion 33α, and an edge is provided at the bottom of the protruding portion 31 so that the protruding portion 31 fits into the groove. Become. The above-mentioned sea urchin guide rail 33 is connected to the above-mentioned guide rail 2 in the advancing direction of the convex part 31.
Similar to 4.25, the height is set to gradually increase, so the rotating member 20 is centered around the shaft 21.
While rotating and moving in the axial direction, the height gradually increases. Thereafter, as shown in FIG. 8, at the tape mounting completion position, the convex portion filter 1 is located away from the guide rail 33. At this time, the outlet base 19, which is swingably supported by the rotating member 20, is fitted into the position regulating member 34 of the tape guide and its position is regulated. This will be discussed later. Also, during recording and reproduction, the pin 29 attached to the end of the pinch roller holding lever 28 moves in the direction of the arrow due to a solenoid or the like (not shown), and the pinch roller holding lever 28 rotates around the shaft 27. The pinch roller 14, which is swingably and rotatably held by the pinch roller holding lever 28, is pressed against the capstan shaft 13, and the tape runs.

On the other hand, the cylinder entry side guide 8 and the width regulating tape guide 7 are fixed on the base 37, and the base 67 is attached to the rotating lever 38.
On the other hand, similar to the relationship between the base 19 and the rotating member 20,
are swingably connected.

The rotating lever 38 rotates around the rotating shaft 40 and moves in the direction of the arrow from the position 38' before starting tape loading, so that the entry base 67 fits into the position regulating member 66 and the cylinder entry side tape is moved in the direction of the arrow. The positions of the guide 8 and the width regulating tape guide 7 are regulated, and tape mounting is completed.

Next, a method for regulating the position of the tape guide when mounting the tape will be described in detail. FIG. 9 shows the position regulating member 36, the entrance guide, and the lever on the tape entrance side. As shown in FIG. 8, the position regulating member 36 is fixed to a cylinder base (not shown) or the like through a positioning groove formed in a positioning pin 43 or the like. The position regulating member 3B is provided with a V- or U-shaped groove 39,40 as shown in FIG. are engaged respectively.

Further, at this time, the entrance side base 37 is pushed against the position regulating member 66 due to the rotation moment of the entrance side lever 380.

Further, the width regulating guide base 44 is located in the groove portion 39, 40. When the protrusions 42 engage, the upper and lower sides of the width regulating guide 7 are supported, and the direction of the central axes of the width regulating guide 7 and the entrance tape guide 8 as well as the lateral position of the width regulating guide 7 are regulated. Ru.

At this time, the entrance base 3Z itself also engages between the upper regulating part 46 and the lower regulating part 45 of the position regulating member 36,
By regulating the vertical height position of the entrance base 37, the axial height positions of the width regulating guide 7 and the entrance tape guide 8 are also restricted. In addition, the entrance side base end 57a is pressed against the side wall portion 411C of the position regulating member 3B, and the entrance side base 6
The position of the entrance tape guide 8 is regulated by restricting rotation of the width regulating guide 7 about the central axis of the width regulating guide 7. The position of the tape guide when the tape is loaded on the entry side of the cylinder is regulated as described above, and the position of the guide on the cylinder exit side is regulated in exactly the same manner. However, the pressing force in this case is obtained from the fact that the wire spring 26 shown in FIG. 4 is deformed by the rotation of the rotary lever 20 and a force for returning the spring is applied to the output base 191C.

〔Effect of the invention〕

According to the present invention, it is possible to manufacture a reliable tape mounting device that is lightweight, compact, and has a small number of parts and is suitable for winding tape around a cylinder at a wide angle.

[Brief explanation of drawings]

FIG. 1 is a side view showing a conventional tape loading mechanism, FIG. 2 is a diagram showing a tape running system of the present invention, FIG. 3 is a diagram showing a tape loading operation, and FIG. 4 is a side view of a conventional tape loading mechanism. A diagram showing the rotating member part, FIG. 5 shows the position of the rotating member during the tape loading operation.
#t; FIG. 6 is a side view showing the height position regulating mechanism of the rotating member; FIG. 7 is an enlarged view of a portion of FIG. 6; FIG. 8 is a diagram showing the tape guide position regulating mechanism. , FIG. 9 is a perspective view showing the position regulating mechanism on the cylinder entry side. 1: Cassette 4: Magnetic tape 5: @Regulation tape guide 8 Nijilinda entrance guide 9 Nijilinda 10 Nijilinda exit guide 11: Width regulation tape guide 16: Capstan 14: Pinch roller j6: Standing guide 17: Inclined guide 19: Exiting Side base 2D: Rotating member 21: Loading ring 22: Axis 23: Guide member 24: Inner jJ light rail 25: Outer guide tray /l/
26: Wire spring 33 Two guide rails 36: Position regulating member 67: Entrance side base 38: Rotating lever 39: Groove 40: Groove 42: Convex portion 44: Width regulating guide base 1 Figure 2 Rifu 3 Figure 4 Seki/-14 11/ Fig. 6 Fig. 8 Fig. 9 Fig. (a) - Comb) Continued from page 1 Ichitotsukanai

Claims (1)

[Claims] In order to pull out a magnetic tape from a tape cassette and wind it diagonally around a cylinder in a predetermined manner, a movable member that rotates all the way around the cylinder, a shaft fixed to this movable member, and a shaft that rotates in the axial direction are used. In a tape mounting device consisting of a movably supported part and a tape guide supported on this member, the movement of the rotating member in the central axis direction is restricted as the rotating member moves around the cylinder. A tape mounting device characterized in that it uses a ring-shaped guide member with a tapered groove and a guide rail that engages with the groove of the guide member.